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@returns: string|number|null → string | number. JSDoc includes null/undefined but TypeScript infers the value is always present. Either the code guarantees a value, or add runtime checks.

@returns: string|null → string. JSDoc includes null/undefined but TypeScript infers the value is always present. Either the code guarantees a value, or add runtime checks.

@param 'options': object → { decimalPlaces?: number; fixedDecimals?: number; thousan.... JSDoc uses generic "object" but TypeScript infers a specific shape. Consider using @typedef to document the object structure.

@returns: number|null → number. JSDoc includes null/undefined but TypeScript infers the value is always present. Either the code guarantees a value, or add runtime checks.